Students attending this lecture should learn the basics of adaptive filters. To achieve this, necessary algorithms will be derived and applied to problems arising in speech and audio processing. The algorithms comprise Wiener filtering, linear prediction, and adaptive schemes such as the NLMS algorithm, affine projection, and the RLS algorithm. For applications from speech and audio processing we use noise and reverberation reduction, echo cancellation, and beamforming.

Topic overview:

Introduction and application examples

Signal properties and cost functions

Wiener filter and principle of orthogonality

Linear prediction

RLS algorithm

LMS algorithm and its normalized version

Affine projection algorithm

Control of adaptive filters

Efficient processing structures

Applications of linear prediction

News

The exam dates have been set. There are a total of five dates available from July until September. Also remember to sign up for a talk as this is a prerequisite to sit the exam.

Lecture Slides

Extensions

Extension for the lecture "Wiener Filter"
(derivation of the error surface)

Matlab Demos

Matlab demo (GUI based) for adaptive system identification

Matlab demo (GUI based) for adaptive noise suppression

Matlab demo (GUI based) for linear prediction

Matlab demo (GUI based) for the NLMS algorithms

Matlab demo (GUI based) for prediction-based filter design

Exercises

The first exercise will be on 04.05.2018 at 8.15 h in F-SR III. Please prepare by reviewing the topics Wiener Filter and Linear Prediction.

The second exercise will be on 01.06.2018 at 8.15 h in F-SR III. Please prepare by reviewing the topics Algorithms and Control.

At the end of the semester, each student will give a talk about a certain topic as a prerequisite to sit the exam. The aim is both to give you the chance to work on an adaptive filter-related topic that interests you, and to improve your presentational skills. The talks should take ten minutes, plus 2.5 minutes of discussion and 2.5 minutes of feedback.

Please contact This email address is being protected from spambots. You need JavaScript enabled to view it. with your topic suggestion. Below you can find the current schedule of the talks.

Date

Room

Time

Topic

Presenter(s)

22.06.2018

F-SR III

08:20 h

Active Noise Control in Headphones

Fynn Kamrath

22.06.2018

F-SR III

08:35 h

Adaptive Filters in Hearing Aids

Sreejith Gopakumar

22.06.2018

F-SR III

08:50 h

Adaptation of Neural Networks

Erman Kalpakçı

22.06.2018

F-SR III

09:05 h

Nonlinear Echo Cancellation

Claudius Karnstädt

22.06.2018

F-SR III

09:30 h

ROSE-Filter for Radar Tracking

Fabian Heuer, Simon Helling

22.06.2018

F-SR III

09:55 h

Filtered-X LMS Algorithm

Tobias Seide

22.06.2018

F-SR III

10:10 h

Adaptive Filters in Retinal Implants

Patricia Piepjohn

22.06.2018

F-SR III

10:25 h

Adaptive Beamforming

Joscha Schaumburg, Karl Heger

29.06.2018

F-SR III

08:20 h

Noise Cancellation in ECG Signals using Adaptive Filters

Malte Wrobel

29.06.2018

F-SR III

08:35 h

Nonlinear Equalization

Nico Simoski

29.06.2018

F-SR III

08:50 h

Adaptive Image Filters to Suppress Noise

Ali Hadidi, Ayman Soukieh

29.06.2018

F-SR III

09:15 h

MPEG Audio Coding

Anton Lösch

29.06.2018

F-SR III

09:40 h

Phased Locked Loop using Adaptive Filters

Gyde Carstens, Tim Benedikt Kupke

29.06.2018

F-SR III

10:05 h

Adaptive Filters in Military Applications

Christian Olsiewski

29.06.2018

F-SR III

10:20 h

GSM Source Coding

Max Timmermann

29.06.2018

F-SR III

10:35 h

Signal Prediction

Gerrit Oldenburger, Egzon Miftaraj

Exams

Below is the list of students with their exam dates. If you do not have a date for the exam yet please register in the online booking system. You can find the booking system here.

Recent Publications

E. Elzenheimer, H. Laufs, T. Sander-Thömmes, G. Schmidt: Magnetoneurograhy of an Electrically Stimulated Arm Nerve, Joint Journal of the German Society for Biomedical Engineering in VDE and the Austrian and Swiss Societies for Biomedical Engineering and the German Society of Biomaterials, Volume 63, Number 12, Pages 363-366, September 2018

Recent News

At the end of October (24.10.2018 till 27.10.2018) we spent again a few days on the island Sylt to reflect our past, current, and future research work. This included all Ph.D. topics but also the general direction of our research. Of course, also teaching and team related issues were discussed. Beside all that official work we also enjoyed the time on that beautiful island with several common ...